includes/specials/SpecialUpload.php

   1 <?php
   2 /**
   3  * @file
   4  * @ingroup SpecialPage
   5  */
   6
   7
   8 /**
   9  * Entry point
  10  */
  11 function wfSpecialUpload() {
  12         global $wgRequest;
  13         $form = new UploadForm( $wgRequest );
  14         $form->execute();
  15 }
  16
  17 /**
  18  * implements Special:Upload
  19  * @ingroup SpecialPage
  20  */
  21 class UploadForm {
  22         const SUCCESS = 0;
  23         const BEFORE_PROCESSING = 1;
  24         const LARGE_FILE_SERVER = 2;
  25         const EMPTY_FILE = 3;
  26         const MIN_LENGTH_PARTNAME = 4;
  27         const ILLEGAL_FILENAME = 5;
  28         const PROTECTED_PAGE = 6;
  29         const OVERWRITE_EXISTING_FILE = 7;
  30         const FILETYPE_MISSING = 8;
  31         const FILETYPE_BADTYPE = 9;
  32         const VERIFICATION_ERROR = 10;
  33         const UPLOAD_VERIFICATION_ERROR = 11;
  34         const UPLOAD_WARNING = 12;
  35         const INTERNAL_ERROR = 13;
  36
  37         /**#@+
  38          * @access private
  39          */
  40         var $mComment, $mLicense, $mIgnoreWarning, $mCurlError;
  41         var $mDestName, $mTempPath, $mFileSize, $mFileProps;
  42         var $mCopyrightStatus, $mCopyrightSource, $mReUpload, $mAction, $mUploadClicked;
  43         var $mSrcName, $mSessionKey, $mStashed, $mDesiredDestName, $mRemoveTempFile, $mSourceType;
  44         var $mDestWarningAck, $mCurlDestHandle;
  45         var $mLocalFile;
  46
  47         # Placeholders for text injection by hooks (must be HTML)
  48         # extensions should take care to _append_ to the present value
  49         var $uploadFormTextTop;
  50         var $uploadFormTextAfterSummary;
  51
  52         const SESSION_VERSION = 1;
  53         /**#@-*/
  54
  55         /**
  56          * Constructor : initialise object
  57          * Get data POSTed through the form and assign them to the object
  58          * @param $request Data posted.
  59          */
  60         function UploadForm( &$request ) {
  61                 global $wgAllowCopyUploads;
  62                 $this->mDesiredDestName   = $request->getText( 'wpDestFile' );
  63                 $this->mIgnoreWarning     = $request->getCheck( 'wpIgnoreWarning' );
  64                 $this->mComment           = $request->getText( 'wpUploadDescription' );
  65                 $this->mForReUpload       = $request->getBool( 'wpForReUpload' );
  66                 $this->mReUpload          = $request->getCheck( 'wpReUpload' );
  67
  68                 if( !$request->wasPosted() ) {
  69                         # GET requests just give the main form; no data except destination
  70                         # filename and description
  71                         return;
  72                 }
  73
  74                 # Placeholders for text injection by hooks (empty per default)
  75                 $this->uploadFormTextTop = "";
  76                 $this->uploadFormTextAfterSummary = "";
  77                 $this->mUploadClicked     = $request->getCheck( 'wpUpload' );
  78
  79                 $this->mLicense           = $request->getText( 'wpLicense' );
  80                 $this->mCopyrightStatus   = $request->getText( 'wpUploadCopyStatus' );
  81                 $this->mCopyrightSource   = $request->getText( 'wpUploadSource' );
  82                 $this->mWatchthis         = $request->getBool( 'wpWatchthis' );
  83                 $this->mSourceType        = $request->getText( 'wpSourceType' );
  84                 $this->mDestWarningAck    = $request->getText( 'wpDestFileWarningAck' );
  85
  86                 $this->mAction            = $request->getVal( 'action' );
  87
  88                 $this->mSessionKey        = $request->getInt( 'wpSessionKey' );
  89                 if( !empty( $this->mSessionKey ) &&
  90                         isset( $_SESSION['wsUploadData'][$this->mSessionKey]['version'] ) &&
  91                         $_SESSION['wsUploadData'][$this->mSessionKey]['version'] == self::SESSION_VERSION ) {
  92                         /**
  93                          * Confirming a temporarily stashed upload.
  94                          * We don't want path names to be forged, so we keep
  95                          * them in the session on the server and just give
  96                          * an opaque key to the user agent.
  97                          */
  98                         $data = $_SESSION['wsUploadData'][$this->mSessionKey];
  99                         $this->mTempPath         = $data['mTempPath'];
 100                         $this->mFileSize         = $data['mFileSize'];
 101                         $this->mSrcName          = $data['mSrcName'];
 102                         $this->mFileProps        = $data['mFileProps'];
 103                         $this->mCurlError        = 0/*UPLOAD_ERR_OK*/;
 104                         $this->mStashed          = true;
 105                         $this->mRemoveTempFile   = false;
 106                 } else {
 107                         /**
 108                          *Check for a newly uploaded file.
 109                          */
 110                         if( $wgAllowCopyUploads && $this->mSourceType == 'web' ) {
 111                                 $this->initializeFromUrl( $request );
 112                         } else {
 113                                 $this->initializeFromUpload( $request );
 114                         }
 115                 }
 116         }
 117
 118         /**
 119          * Initialize the uploaded file from PHP data
 120          * @access private
 121          */
 122         function initializeFromUpload( $request ) {
 123                 $this->mTempPath       = $request->getFileTempName( 'wpUploadFile' );
 124                 $this->mFileSize       = $request->getFileSize( 'wpUploadFile' );
 125                 $this->mSrcName        = $request->getFileName( 'wpUploadFile' );
 126                 $this->mCurlError      = $request->getUploadError( 'wpUploadFile' );
 127                 $this->mSessionKey     = false;
 128                 $this->mStashed        = false;
 129                 $this->mRemoveTempFile = false; // PHP will handle this
 130         }
 131
 132         /**
 133          * Copy a web file to a temporary file
 134          * @access private
 135          */
 136         function initializeFromUrl( $request ) {
 137                 global $wgTmpDirectory;
 138                 $url = $request->getText( 'wpUploadFileURL' );
 139                 $local_file = tempnam( $wgTmpDirectory, 'WEBUPLOAD' );
 140
 141                 $this->mTempPath       = $local_file;
 142                 $this->mFileSize       = 0; # Will be set by curlCopy
 143                 $this->mCurlError      = $this->curlCopy( $url, $local_file );
 144                 $pathParts             = explode( '/', $url );
 145                 $this->mSrcName        = array_pop( $pathParts );
 146                 $this->mSessionKey     = false;
 147                 $this->mStashed        = false;
 148
 149                 // PHP won't auto-cleanup the file
 150                 $this->mRemoveTempFile = file_exists( $local_file );
 151         }
 152
 153         /**
 154          * Safe copy from URL
 155          * Returns true if there was an error, false otherwise
 156          */
 157         private function curlCopy( $url, $dest ) {
 158                 global $wgUser, $wgOut, $wgHTTPProxy, $wgCopyUploadTimeout;
 159
 160                 if( !$wgUser->isAllowed( 'upload_by_url' ) ) {
 161                         $wgOut->permissionRequired( 'upload_by_url' );
 162                         return true;
 163                 }
 164
 165                 # Maybe remove some pasting blanks :-)
 166                 $url =  trim( $url );
 167                 if( stripos($url, 'http://') !== 0 && stripos($url, 'ftp://') !== 0 ) {
 168                         # Only HTTP or FTP URLs
 169                         $wgOut->showErrorPage( 'upload-proto-error', 'upload-proto-error-text' );
 170                         return true;
 171                 }
 172
 173                 # Open temporary file
 174                 $this->mCurlDestHandle = @fopen( $this->mTempPath, "wb" );
 175                 if( $this->mCurlDestHandle === false ) {
 176                         # Could not open temporary file to write in
 177                         $wgOut->showErrorPage( 'upload-file-error', 'upload-file-error-text');
 178                         return true;
 179                 }
 180
 181                 $ch = curl_init();
 182                 curl_setopt( $ch, CURLOPT_HTTP_VERSION, 1.0); # Probably not needed, but apparently can work around some bug
 183                 curl_setopt( $ch, CURLOPT_TIMEOUT, $wgCopyUploadTimeout); # Default 30 seconds timeout
 184                 curl_setopt( $ch, CURLOPT_LOW_SPEED_LIMIT, 512); # 0.5KB per second minimum transfer speed
 185                 curl_setopt( $ch, CURLOPT_URL, $url);
 186                 if( $wgHTTPProxy ) {
 187                         curl_setopt( $ch, CURLOPT_PROXY, $wgHTTPProxy );
 188                 }
 189                 curl_setopt( $ch, CURLOPT_WRITEFUNCTION, array( $this, 'uploadCurlCallback' ) );
 190                 curl_exec( $ch );
 191                 $error = curl_errno( $ch ) ? true : false;
 192                 $errornum =  curl_errno( $ch );
 193                 // if ( $error ) print curl_error ( $ch ) ; # Debugging output
 194                 curl_close( $ch );
 195
 196                 fclose( $this->mCurlDestHandle );
 197                 unset( $this->mCurlDestHandle );
 198                 if( $error ) {
 199                         unlink( $dest );
 200                         if( wfEmptyMsg( "upload-curl-error$errornum", wfMsg("upload-curl-error$errornum") ) )
 201                                 $wgOut->showErrorPage( 'upload-misc-error', 'upload-misc-error-text' );
 202                         else
 203                                 $wgOut->showErrorPage( "upload-curl-error$errornum", "upload-curl-error$errornum-text" );
 204                 }
 205
 206                 return $error;
 207         }
 208
 209         /**
 210          * Callback function for CURL-based web transfer
 211          * Write data to file unless we've passed the length limit;
 212          * if so, abort immediately.
 213          * @access private
 214          */
 215         function uploadCurlCallback( $ch, $data ) {
 216                 global $wgMaxUploadSize;
 217                 $length = strlen( $data );
 218                 $this->mFileSize += $length;
 219                 if( $this->mFileSize > $wgMaxUploadSize ) {
 220                         return 0;
 221                 }
 222                 fwrite( $this->mCurlDestHandle, $data );
 223                 return $length;
 224         }
 225
 226         /**
 227          * Start doing stuff
 228          * @access public
 229          */
 230         function execute() {
 231                 global $wgUser, $wgOut;
 232                 global $wgEnableUploads;
 233
 234                 # Check php's file_uploads setting
 235                 if( !wfIniGetBool( 'file_uploads' ) ) {
 236                         $wgOut->showErrorPage( 'uploaddisabled', 'php-uploaddisabledtext', array( $this->mDesiredDestName ) );
 237                         return;
 238                 }
 239
 240                 # Check uploading enabled
 241                 if( !$wgEnableUploads ) {
 242                         $wgOut->showErrorPage( 'uploaddisabled', 'uploaddisabledtext', array( $this->mDesiredDestName ) );
 243                         return;
 244                 }
 245
 246                 # Check permissions
 247                 global $wgGroupPermissions;
 248                 if( !$wgUser->isAllowed( 'upload' ) ) {
 249                         if( !$wgUser->isLoggedIn() && ( $wgGroupPermissions['user']['upload']
 250                                 || $wgGroupPermissions['autoconfirmed']['upload'] ) ) {
 251                                 // Custom message if logged-in users without any special rights can upload
 252                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
 253                         } else {
 254                                 $wgOut->permissionRequired( 'upload' );
 255                         }
 256                         return;
 257                 }
 258
 259                 # Check blocks
 260                 if( $wgUser->isBlocked() ) {
 261                         $wgOut->blockedPage();
 262                         return;
 263                 }
 264
 265                 if( wfReadOnly() ) {
 266                         $wgOut->readOnlyPage();
 267                         return;
 268                 }
 269
 270                 if( $this->mReUpload ) {
 271                         if( !$this->unsaveUploadedFile() ) {
 272                                 return;
 273                         }
 274                         # Because it is probably checked and shouldn't be
 275                         $this->mIgnoreWarning = false;
 276
 277                         $this->mainUploadForm();
 278                 } else if( 'submit' == $this->mAction || $this->mUploadClicked ) {
 279                         $this->processUpload();
 280                 } else {
 281                         $this->mainUploadForm();
 282                 }
 283
 284                 $this->cleanupTempFile();
 285         }
 286
 287         /**
 288          * Do the upload
 289          * Checks are made in SpecialUpload::execute()
 290          *
 291          * @access private
 292          */
 293         function processUpload(){
 294                 global $wgOut, $wgFileExtensions, $wgLang;
 295                 $details = null;
 296                 $value = null;
 297                 $value = $this->internalProcessUpload( $details );
 298
 299                 switch($value) {
 300                         case self::SUCCESS:
 301                                 $wgOut->redirect( $this->mLocalFile->getTitle()->getFullURL() );
 302                                 break;
 303
 304                         case self::BEFORE_PROCESSING:
 305                                 break;
 306
 307                         case self::LARGE_FILE_SERVER:
 308                                 $this->mainUploadForm( wfMsgHtml( 'largefileserver' ) );
 309                                 break;
 310
 311                         case self::EMPTY_FILE:
 312                                 $this->mainUploadForm( wfMsgHtml( 'emptyfile' ) );
 313                                 break;
 314
 315                         case self::MIN_LENGTH_PARTNAME:
 316                                 $this->mainUploadForm( wfMsgHtml( 'minlength1' ) );
 317                                 break;
 318
 319                         case self::ILLEGAL_FILENAME:
 320                                 $filtered = $details['filtered'];
 321                                 $this->uploadError( wfMsgWikiHtml( 'illegalfilename', htmlspecialchars( $filtered ) ) );
 322                                 break;
 323
 324                         case self::PROTECTED_PAGE:
 325                                 $wgOut->showPermissionsErrorPage( $details['permissionserrors'] );
 326                                 break;
 327
 328                         case self::OVERWRITE_EXISTING_FILE:
 329                                 $errorText = $details['overwrite'];
 330                                 $this->uploadError( $wgOut->parse( $errorText ) );
 331                                 break;
 332
 333                         case self::FILETYPE_MISSING:
 334                                 $this->uploadError( wfMsgExt( 'filetype-missing', array ( 'parseinline' ) ) );
 335                                 break;
 336
 337                         case self::FILETYPE_BADTYPE:
 338                                 $finalExt = $details['finalExt'];
 339                                 $this->uploadError(
 340                                         wfMsgExt( 'filetype-banned-type',
 341                                                 array( 'parseinline' ),
 342                                                 htmlspecialchars( $finalExt ),
 343                                                 $wgLang->commaList( $wgFileExtensions ),
 344                                                 $wgLang->formatNum( count($wgFileExtensions) )
 345                                         )
 346                                 );
 347                                 break;
 348
 349                         case self::VERIFICATION_ERROR:
 350                                 $veri = $details['veri'];
 351                                 $this->uploadError( $veri->toString() );
 352                                 break;
 353
 354                         case self::UPLOAD_VERIFICATION_ERROR:
 355                                 $error = $details['error'];
 356                                 $this->uploadError( $error );
 357                                 break;
 358
 359                         case self::UPLOAD_WARNING:
 360                                 $warning = $details['warning'];
 361                                 $this->uploadWarning( $warning );
 362                                 break;
 363
 364                         case self::INTERNAL_ERROR:
 365                                 $internal = $details['internal'];
 366                                 $this->showError( $internal );
 367                                 break;
 368
 369                         default:
 370                                 throw new MWException( __METHOD__ . ": Unknown value `{$value}`" );
 371                 }
 372         }
 373
 374         /**
 375          * Really do the upload
 376          * Checks are made in SpecialUpload::execute()
 377          *
 378          * @param array $resultDetails contains result-specific dict of additional values
 379          *
 380          * @access private
 381          */
 382         function internalProcessUpload( &$resultDetails ) {
 383                 global $wgUser;
 384
 385                 if( !wfRunHooks( 'UploadForm:BeforeProcessing', array( &$this ) ) )
 386                 {
 387                         wfDebug( "Hook 'UploadForm:BeforeProcessing' broke processing the file.\n" );
 388                         return self::BEFORE_PROCESSING;
 389                 }
 390
 391                 /**
 392                  * If there was no filename or a zero size given, give up quick.
 393                  */
 394                 if( trim( $this->mSrcName ) == '' || empty( $this->mFileSize ) ) {
 395                         return self::EMPTY_FILE;
 396                 }
 397
 398                 /* Check for curl error */
 399                 if( $this->mCurlError ) {
 400                         return self::BEFORE_PROCESSING;
 401                 }
 402
 403                 /**
 404                  * Chop off any directories in the given filename. Then
 405                  * filter out illegal characters, and try to make a legible name
 406                  * out of it. We'll strip some silently that Title would die on.
 407                  */
 408                 if( $this->mDesiredDestName ) {
 409                         $basename = $this->mDesiredDestName;
 410                 } else {
 411                         $basename = $this->mSrcName;
 412                 }
 413                 $filtered = wfStripIllegalFilenameChars( $basename );
 414
 415                 /* Normalize to title form before we do any further processing */
 416                 $nt = Title::makeTitleSafe( NS_FILE, $filtered );
 417                 if( is_null( $nt ) ) {
 418                         $resultDetails = array( 'filtered' => $filtered );
 419                         return self::ILLEGAL_FILENAME;
 420                 }
 421                 $filtered = $nt->getDBkey();
 422
 423                 /**
 424                  * We'll want to blacklist against *any* 'extension', and use
 425                  * only the final one for the whitelist.
 426                  */
 427                 list( $partname, $ext ) = $this->splitExtensions( $filtered );
 428
 429                 if( count( $ext ) ) {
 430                         $finalExt = $ext[count( $ext ) - 1];
 431                 } else {
 432                         $finalExt = '';
 433                 }
 434
 435                 # If there was more than one "extension", reassemble the base
 436                 # filename to prevent bogus complaints about length
 437                 if( count( $ext ) > 1 ) {
 438                         for( $i = 0; $i < count( $ext ) - 1; $i++ )
 439                                 $partname .= '.' . $ext[$i];
 440                 }
 441
 442                 if( strlen( $partname ) < 1 ) {
 443                         return self::MIN_LENGTH_PARTNAME;
 444                 }
 445
 446                 $this->mLocalFile = wfLocalFile( $nt );
 447                 $this->mDestName = $this->mLocalFile->getName();
 448
 449                 /**
 450                  * If the image is protected, non-sysop users won't be able
 451                  * to modify it by uploading a new revision.
 452                  */
 453                 $permErrors = $nt->getUserPermissionsErrors( 'edit', $wgUser );
 454                 $permErrorsUpload = $nt->getUserPermissionsErrors( 'upload', $wgUser );
 455                 $permErrorsCreate = ( $nt->exists() ? array() : $nt->getUserPermissionsErrors( 'create', $wgUser ) );
 456
 457                 if( $permErrors || $permErrorsUpload || $permErrorsCreate ) {
 458                         // merge all the problems into one list, avoiding duplicates
 459                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsUpload, $permErrors ) );
 460                         $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsCreate, $permErrors ) );
 461                         $resultDetails = array( 'permissionserrors' => $permErrors );
 462                         return self::PROTECTED_PAGE;
 463                 }
 464
 465                 /**
 466                  * In some cases we may forbid overwriting of existing files.
 467                  */
 468                 $overwrite = $this->checkOverwrite( $this->mDestName );
 469                 if( $overwrite !== true ) {
 470                         $resultDetails = array( 'overwrite' => $overwrite );
 471                         return self::OVERWRITE_EXISTING_FILE;
 472                 }
 473
 474                 /* Don't allow users to override the blacklist (check file extension) */
 475                 global $wgCheckFileExtensions, $wgStrictFileExtensions;
 476                 global $wgFileExtensions, $wgFileBlacklist;
 477                 if ($finalExt == '') {
 478                         return self::FILETYPE_MISSING;
 479                 } elseif ( $this->checkFileExtensionList( $ext, $wgFileBlacklist ) ||
 480                                 ($wgCheckFileExtensions && $wgStrictFileExtensions &&
 481                                         !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) ) {
 482                         $resultDetails = array( 'finalExt' => $finalExt );
 483                         return self::FILETYPE_BADTYPE;
 484                 }
 485
 486                 /**
 487                  * Look at the contents of the file; if we can recognize the
 488                  * type but it's corrupt or data of the wrong type, we should
 489                  * probably not accept it.
 490                  */
 491                 if( !$this->mStashed ) {
 492                         $this->mFileProps = File::getPropsFromPath( $this->mTempPath, $finalExt );
 493                         $this->checkMacBinary();
 494                         $veri = $this->verify( $this->mTempPath, $finalExt );
 495
 496                         if( $veri !== true ) { //it's a wiki error...
 497                                 $resultDetails = array( 'veri' => $veri );
 498                                 return self::VERIFICATION_ERROR;
 499                         }
 500
 501                         /**
 502                          * Provide an opportunity for extensions to add further checks
 503                          */
 504                         $error = '';
 505                         if( !wfRunHooks( 'UploadVerification',
 506                                         array( $this->mDestName, $this->mTempPath, &$error ) ) ) {
 507                                 $resultDetails = array( 'error' => $error );
 508                                 return self::UPLOAD_VERIFICATION_ERROR;
 509                         }
 510                 }
 511
 512
 513                 /**
 514                  * Check for non-fatal conditions
 515                  */
 516                 if ( ! $this->mIgnoreWarning ) {
 517                         $warning = '';
 518
 519                         $comparableName = str_replace( ' ', '_', $basename );
 520                         global $wgCapitalLinks, $wgContLang;
 521                         if ( $wgCapitalLinks ) {
 522                                 $comparableName = $wgContLang->ucfirst( $comparableName );
 523                         }
 524
 525                         if( $comparableName !== $filtered ) {
 526                                 $warning .=  '<li>'.wfMsgHtml( 'badfilename', htmlspecialchars( $this->mDestName ) ).'</li>';
 527                         }
 528
 529                         global $wgCheckFileExtensions;
 530                         if ( $wgCheckFileExtensions ) {
 531                                 if ( !$this->checkFileExtension( $finalExt, $wgFileExtensions ) ) {
 532                                         global $wgLang;
 533                                         $warning .= '<li>' .
 534                                         wfMsgExt( 'filetype-unwanted-type',
 535                                                 array( 'parseinline' ),
 536                                                 htmlspecialchars( $finalExt ),
 537                                                 $wgLang->commaList( $wgFileExtensions ),
 538                                                 $wgLang->formatNum( count($wgFileExtensions) )
 539                                         ) . '</li>';
 540                                 }
 541                         }
 542
 543                         global $wgUploadSizeWarning;
 544                         if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) ) {
 545                                 $skin = $wgUser->getSkin();
 546                                 $wsize = $skin->formatSize( $wgUploadSizeWarning );
 547                                 $asize = $skin->formatSize( $this->mFileSize );
 548                                 $warning .= '<li>' . wfMsgHtml( 'large-file', $wsize, $asize ) . '</li>';
 549                         }
 550                         if ( $this->mFileSize == 0 ) {
 551                                 $warning .= '<li>'.wfMsgHtml( 'emptyfile' ).'</li>';
 552                         }
 553
 554                         if ( !$this->mDestWarningAck ) {
 555                                 $warning .= self::getExistsWarning( $this->mLocalFile );
 556                         }
 557
 558                         $warning .= $this->getDupeWarning( $this->mTempPath, $finalExt, $nt );
 559
 560                         if( $warning != '' ) {
 561                                 /**
 562                                  * Stash the file in a temporary location; the user can choose
 563                                  * to let it through and we'll complete the upload then.
 564                                  */
 565                                 $resultDetails = array( 'warning' => $warning );
 566                                 return self::UPLOAD_WARNING;
 567                         }
 568                 }
 569
 570                 /**
 571                  * Try actually saving the thing...
 572                  * It will show an error form on failure.
 573                  */
 574                 if( !$this->mForReUpload ) {
 575                         $pageText = self::getInitialPageText( $this->mComment, $this->mLicense,
 576                                 $this->mCopyrightStatus, $this->mCopyrightSource );
 577                 } else {
 578                         $pageText = false;
 579                 }
 580
 581                 $status = $this->mLocalFile->upload( $this->mTempPath, $this->mComment, $pageText,
 582                         File::DELETE_SOURCE, $this->mFileProps );
 583                 if ( !$status->isGood() ) {
 584                         $resultDetails = array( 'internal' => $status->getWikiText() );
 585                         return self::INTERNAL_ERROR;
 586                 } else {
 587                         if ( $this->mWatchthis ) {
 588                                 global $wgUser;
 589                                 $wgUser->addWatch( $this->mLocalFile->getTitle() );
 590                         }
 591                         // Success, redirect to description page
 592                         $img = null; // @todo: added to avoid passing a ref to null - should this be defined somewhere?
 593                         wfRunHooks( 'UploadComplete', array( &$this ) );
 594                         return self::SUCCESS;
 595                 }
 596         }
 597
 598         /**
 599          * Do existence checks on a file and produce a warning
 600          * This check is static and can be done pre-upload via AJAX
 601          * Returns an HTML fragment consisting of one or more LI elements if there is a warning
 602          * Returns an empty string if there is no warning
 603          */
 604         static function getExistsWarning( $file ) {
 605                 global $wgUser, $wgContLang;
 606                 // Check for uppercase extension. We allow these filenames but check if an image
 607                 // with lowercase extension exists already
 608                 $warning = '';
 609                 $align = $wgContLang->isRtl() ? 'left' : 'right';
 610
 611                 if( strpos( $file->getName(), '.' ) == false ) {
 612                         $partname = $file->getName();
 613                         $rawExtension = '';
 614                 } else {
 615                         $n = strrpos( $file->getName(), '.' );
 616                         $rawExtension = substr( $file->getName(), $n + 1 );
 617                         $partname = substr( $file->getName(), 0, $n );
 618                 }
 619
 620                 $sk = $wgUser->getSkin();
 621
 622                 if ( $rawExtension != $file->getExtension() ) {
 623                         // We're not using the normalized form of the extension.
 624                         // Normal form is lowercase, using most common of alternate
 625                         // extensions (eg 'jpg' rather than 'JPEG').
 626                         //
 627                         // Check for another file using the normalized form...
 628                         $nt_lc = Title::makeTitle( NS_FILE, $partname . '.' . $file->getExtension() );
 629                         $file_lc = wfLocalFile( $nt_lc );
 630                 } else {
 631                         $file_lc = false;
 632                 }
 633
 634                 if( $file->exists() ) {
 635                         $dlink = $sk->linkKnown( $file->getTitle() );
 636                         if ( $file->allowInlineDisplay() ) {
 637                                 // FIXME: replace deprecated makeImageLinkObj by link()
 638                                 $dlink2 = $sk->makeImageLinkObj( $file->getTitle(), wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 639                                         $file->getName(), $align, array(), false, true );
 640                         } elseif ( !$file->allowInlineDisplay() && $file->isSafeFile() ) {
 641                                 $icon = $file->iconThumb();
 642                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 643                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 644                         } else {
 645                                 $dlink2 = '';
 646                         }
 647
 648                         $warning .= '<li>' . wfMsgExt( 'fileexists', array('parseinline','replaceafter'), $dlink ) . '</li>' . $dlink2;
 649
 650                 } elseif( $file->getTitle()->getArticleID() ) {
 651                         $lnk = $sk->linkKnown(
 652                                 $file->getTitle(),
 653                                 null,
 654                                 array(),
 655                                 array( 'redirect' => 'no' )
 656                         );
 657                         $warning .= '<li>' . wfMsgExt( 'filepageexists', array( 'parseinline', 'replaceafter' ), $lnk ) . '</li>';
 658                 } elseif ( $file_lc && $file_lc->exists() ) {
 659                         # Check if image with lowercase extension exists.
 660                         # It's not forbidden but in 99% it makes no sense to upload the same filename with uppercase extension
 661                         $dlink = $sk->linkKnown( $nt_lc );
 662                         if ( $file_lc->allowInlineDisplay() ) {
 663                                 // FIXME: replace deprecated makeImageLinkObj by link()
 664                                 $dlink2 = $sk->makeImageLinkObj( $nt_lc, wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 665                                         $nt_lc->getText(), $align, array(), false, true );
 666                         } elseif ( !$file_lc->allowInlineDisplay() && $file_lc->isSafeFile() ) {
 667                                 $icon = $file_lc->iconThumb();
 668                                 $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 669                                         $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' . $dlink . '</div>';
 670                         } else {
 671                                 $dlink2 = '';
 672                         }
 673
 674                         $warning .= '<li>' .
 675                                 wfMsgExt( 'fileexists-extension', 'parsemag',
 676                                         $file->getTitle()->getPrefixedText(), $dlink ) .
 677                                 '</li>' . $dlink2;
 678
 679                 } elseif ( ( substr( $partname , 3, 3 ) == 'px-' || substr( $partname , 2, 3 ) == 'px-' )
 680                         && preg_match( "/[0-9]{2}/" , substr( $partname , 0, 2 ) ) )
 681                 {
 682                         # Check for filenames like 50px- or 180px-, these are mostly thumbnails
 683                         $nt_thb = Title::newFromText( substr( $partname , strpos( $partname , '-' ) +1 ) . '.' . $rawExtension );
 684                         $file_thb = wfLocalFile( $nt_thb );
 685                         if ($file_thb->exists() ) {
 686                                 # Check if an image without leading '180px-' (or similiar) exists
 687                                 $dlink = $sk->linkKnown( $nt_thb );
 688                                 if ( $file_thb->allowInlineDisplay() ) {
 689                                         // FIXME: replace deprecated makeImageLinkObj by link()
 690                                         $dlink2 = $sk->makeImageLinkObj( $nt_thb,
 691                                                 wfMsgExt( 'fileexists-thumb', 'parseinline' ),
 692                                                 $nt_thb->getText(), $align, array(), false, true );
 693                                 } elseif ( !$file_thb->allowInlineDisplay() && $file_thb->isSafeFile() ) {
 694                                         $icon = $file_thb->iconThumb();
 695                                         $dlink2 = '<div style="float:' . $align . '" id="mw-media-icon">' .
 696                                                 $icon->toHtml( array( 'desc-link' => true ) ) . '<br />' .
 697                                                 $dlink . '</div>';
 698                                 } else {
 699                                         $dlink2 = '';
 700                                 }
 701
 702                                 $warning .= '<li>' . wfMsgExt( 'fileexists-thumbnail-yes', 'parsemag', $dlink ) .
 703                                         '</li>' . $dlink2;
 704                         } else {
 705                                 # Image w/o '180px-' does not exists, but we do not like these filenames
 706                                 $warning .= '<li>' . wfMsgExt( 'file-thumbnail-no', 'parseinline' ,
 707                                         substr( $partname , 0, strpos( $partname , '-' ) +1 ) ) . '</li>';
 708                         }
 709                 }
 710
 711                 $filenamePrefixBlacklist = self::getFilenamePrefixBlacklist();
 712                 # Do the match
 713                 foreach( $filenamePrefixBlacklist as $prefix ) {
 714                         if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
 715                                 $warning .= '<li>' . wfMsgExt( 'filename-bad-prefix', 'parseinline', $prefix ) . '</li>';
 716                                 break;
 717                         }
 718                 }
 719
 720                 if ( $file->wasDeleted() && !$file->exists() ) {
 721                         # If the file existed before and was deleted, warn the user of this
 722                         # Don't bother doing so if the file exists now, however
 723                         $ltitle = SpecialPage::getTitleFor( 'Log' );
 724                         $llink = $sk->linkKnown(
 725                                 $ltitle,
 726                                 wfMsgHtml( 'deletionlog' ),
 727                                 array(),
 728                                 array(
 729                                         'type' => 'delete',
 730                                         'page' => $file->getTitle()->getPrefixedUrl()
 731                                 )
 732                         );
 733                         $warning .= '<li>' . wfMsgWikiHtml( 'filewasdeleted', $llink ) . '</li>';
 734                 }
 735                 return $warning;
 736         }
 737
 738         /**
 739          * Get a list of warnings
 740          *
 741          * @param string local filename, e.g. 'file exists', 'non-descriptive filename'
 742          * @return array list of warning messages
 743          */
 744         static function ajaxGetExistsWarning( $filename ) {
 745                 $file = wfFindFile( $filename );
 746                 if( !$file ) {
 747                         // Force local file so we have an object to do further checks against
 748                         // if there isn't an exact match...
 749                         $file = wfLocalFile( $filename );
 750                 }
 751                 $s = '&nbsp;';
 752                 if ( $file ) {
 753                         $warning = self::getExistsWarning( $file );
 754                         if ( $warning !== '' ) {
 755                                 $s = "<ul>$warning</ul>";
 756                         }
 757                 }
 758                 return $s;
 759         }
 760
 761         /**
 762          * Render a preview of a given license for the AJAX preview on upload
 763          *
 764          * @param string $license
 765          * @return string
 766          */
 767         public static function ajaxGetLicensePreview( $license ) {
 768                 global $wgParser, $wgUser;
 769                 $text = '{{' . $license . '}}';
 770                 $title = Title::makeTitle( NS_FILE, 'Sample.jpg' );
 771                 $options = ParserOptions::newFromUser( $wgUser );
 772
 773                 // Expand subst: first, then live templates...
 774                 $text = $wgParser->preSaveTransform( $text, $title, $wgUser, $options );
 775                 $output = $wgParser->parse( $text, $title, $options );
 776
 777                 return $output->getText();
 778         }
 779
 780         /**
 781          * Check for duplicate files and throw up a warning before the upload
 782          * completes.
 783          */
 784         function getDupeWarning( $tempfile, $extension, $destinationTitle ) {
 785                 $hash = File::sha1Base36( $tempfile );
 786                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 787                 $archivedImage = new ArchivedFile( null, 0, $hash.".$extension" );
 788                 if( $dupes ) {
 789                         global $wgOut;
 790                         $msg = "<gallery>";
 791                         foreach( $dupes as $file ) {
 792                                 $title = $file->getTitle();
 793                                 # Don't throw the warning when the titles are the same, it's a reupload
 794                                 # and highly redundant.
 795                                 if ( !$title->equals( $destinationTitle ) || !$this->mForReUpload ) {
 796                                         $msg .= $title->getPrefixedText() .
 797                                                 "|" . $title->getText() . "\n";
 798                                 }
 799                         }
 800                         $msg .= "</gallery>";
 801                         return "<li>" .
 802                                 wfMsgExt( "file-exists-duplicate", array( "parse" ), count( $dupes ) ) .
 803                                 $wgOut->parse( $msg ) .
 804                                 "</li>\n";
 805                 } elseif ( $archivedImage->getID() > 0 ) {
 806                         global $wgOut;
 807                         $name = Title::makeTitle( NS_FILE, $archivedImage->getName() )->getPrefixedText();
 808                         return Xml::tags( 'li', null, wfMsgExt( 'file-deleted-duplicate', array( 'parseinline' ), array( $name ) ) );
 809                 } else {
 810                         return '';
 811                 }
 812         }
 813
 814         /**
 815          * Get a list of blacklisted filename prefixes from [[MediaWiki:filename-prefix-blacklist]]
 816          *
 817          * @return array list of prefixes
 818          */
 819         public static function getFilenamePrefixBlacklist() {
 820                 $blacklist = array();
 821                 $message = wfMsgForContent( 'filename-prefix-blacklist' );
 822                 if( $message && !( wfEmptyMsg( 'filename-prefix-blacklist', $message ) || $message == '-' ) ) {
 823                         $lines = explode( "\n", $message );
 824                         foreach( $lines as $line ) {
 825                                 // Remove comment lines
 826                                 $comment = substr( trim( $line ), 0, 1 );
 827                                 if ( $comment == '#' || $comment == '' ) {
 828                                         continue;
 829                                 }
 830                                 // Remove additional comments after a prefix
 831                                 $comment = strpos( $line, '#' );
 832                                 if ( $comment > 0 ) {
 833                                         $line = substr( $line, 0, $comment-1 );
 834                                 }
 835                                 $blacklist[] = trim( $line );
 836                         }
 837                 }
 838                 return $blacklist;
 839         }
 840
 841         /**
 842          * Stash a file in a temporary directory for later processing
 843          * after the user has confirmed it.
 844          *
 845          * If the user doesn't explicitly cancel or accept, these files
 846          * can accumulate in the temp directory.
 847          *
 848          * @param string $saveName - the destination filename
 849          * @param string $tempName - the source temporary file to save
 850          * @return string - full path the stashed file, or false on failure
 851          * @access private
 852          */
 853         function saveTempUploadedFile( $saveName, $tempName ) {
 854                 global $wgOut;
 855                 $repo = RepoGroup::singleton()->getLocalRepo();
 856                 $status = $repo->storeTemp( $saveName, $tempName );
 857                 if ( !$status->isGood() ) {
 858                         $this->showError( $status->getWikiText() );
 859                         return false;
 860                 } else {
 861                         return $status->value;
 862                 }
 863         }
 864
 865         /**
 866          * Stash a file in a temporary directory for later processing,
 867          * and save the necessary descriptive info into the session.
 868          * Returns a key value which will be passed through a form
 869          * to pick up the path info on a later invocation.
 870          *
 871          * @return int
 872          * @access private
 873          */
 874         function stashSession() {
 875                 $stash = $this->saveTempUploadedFile( $this->mDestName, $this->mTempPath );
 876
 877                 if( !$stash ) {
 878                         # Couldn't save the file.
 879                         return false;
 880                 }
 881
 882                 $key = mt_rand( 0, 0x7fffffff );
 883                 $_SESSION['wsUploadData'][$key] = array(
 884                         'mTempPath'       => $stash,
 885                         'mFileSize'       => $this->mFileSize,
 886                         'mSrcName'        => $this->mSrcName,
 887                         'mFileProps'      => $this->mFileProps,
 888                         'version'         => self::SESSION_VERSION,
 889                 );
 890                 return $key;
 891         }
 892
 893         /**
 894          * Remove a temporarily kept file stashed by saveTempUploadedFile().
 895          * @access private
 896          * @return success
 897          */
 898         function unsaveUploadedFile() {
 899                 global $wgOut;
 900                 if( !$this->mTempPath ) return true; // nothing to delete
 901                 $repo = RepoGroup::singleton()->getLocalRepo();
 902                 $success = $repo->freeTemp( $this->mTempPath );
 903                 if ( ! $success ) {
 904                         $wgOut->showFileDeleteError( $this->mTempPath );
 905                         return false;
 906                 } else {
 907                         return true;
 908                 }
 909         }
 910
 911         /* -------------------------------------------------------------- */
 912
 913         /**
 914          * @param string $error as HTML
 915          * @access private
 916          */
 917         function uploadError( $error ) {
 918                 global $wgOut;
 919                 $wgOut->addHTML( '<h2>' . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 920                 $wgOut->addHTML( '<span class="error">' . $error . '</span>' );
 921         }
 922
 923         /**
 924          * There's something wrong with this file, not enough to reject it
 925          * totally but we require manual intervention to save it for real.
 926          * Stash it away, then present a form asking to confirm or cancel.
 927          *
 928          * @param string $warning as HTML
 929          * @access private
 930          */
 931         function uploadWarning( $warning ) {
 932                 global $wgOut;
 933                 global $wgUseCopyrightUpload;
 934
 935                 $this->mSessionKey = $this->stashSession();
 936                 if( !$this->mSessionKey ) {
 937                         # Couldn't save file; an error has been displayed so let's go.
 938                         return;
 939                 }
 940
 941                 $wgOut->addHTML( '<h2>' . wfMsgHtml( 'uploadwarning' ) . "</h2>\n" );
 942                 $wgOut->addHTML( '<ul class="warning">' . $warning . "</ul>\n" );
 943
 944                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
 945
 946                 if ( $wgUseCopyrightUpload ) {
 947                         $copyright = Xml::hidden( 'wpUploadCopyStatus', $this->mCopyrightStatus ) . "\n" .
 948                                         Xml::hidden( 'wpUploadSource', $this->mCopyrightSource ) . "\n";
 949                 } else {
 950                         $copyright = '';
 951                 }
 952
 953                 $wgOut->addHTML(
 954                         Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL( 'action=submit' ),
 955                                  'enctype' => 'multipart/form-data', 'id' => 'uploadwarning' ) ) . "\n" .
 956                         Xml::hidden( 'wpIgnoreWarning', '1' ) . "\n" .
 957                         Xml::hidden( 'wpSessionKey', $this->mSessionKey ) . "\n" .
 958                         Xml::hidden( 'wpUploadDescription', $this->mComment ) . "\n" .
 959                         Xml::hidden( 'wpLicense', $this->mLicense ) . "\n" .
 960                         Xml::hidden( 'wpDestFile', $this->mDesiredDestName ) . "\n" .
 961                         Xml::hidden( 'wpWatchthis', $this->mWatchthis ) . "\n" .
 962                         "{$copyright}<br />" .
 963                         Xml::submitButton( wfMsg( 'ignorewarning' ), array ( 'name' => 'wpUpload', 'id' => 'wpUpload', 'checked' => 'checked' ) ) . ' ' .
 964                         Xml::submitButton( wfMsg( 'reuploaddesc' ), array ( 'name' => 'wpReUpload', 'id' => 'wpReUpload' ) ) .
 965                         Xml::closeElement( 'form' ) . "\n"
 966                 );
 967         }
 968
 969         /**
 970          * Displays the main upload form, optionally with a highlighted
 971          * error message up at the top.
 972          *
 973          * @param string $msg as HTML
 974          * @access private
 975          */
 976         function mainUploadForm( $msg='' ) {
 977                 global $wgOut, $wgUser, $wgLang, $wgMaxUploadSize;
 978                 global $wgUseCopyrightUpload, $wgUseAjax, $wgAjaxUploadDestCheck, $wgAjaxLicensePreview;
 979                 global $wgRequest, $wgAllowCopyUploads;
 980                 global $wgStylePath, $wgStyleVersion;
 981
 982                 $useAjaxDestCheck = $wgUseAjax && $wgAjaxUploadDestCheck;
 983                 $useAjaxLicensePreview = $wgUseAjax && $wgAjaxLicensePreview;
 984
 985                 $adc = wfBoolToStr( $useAjaxDestCheck );
 986                 $alp = wfBoolToStr( $useAjaxLicensePreview );
 987                 $autofill = wfBoolToStr( $this->mDesiredDestName == '' );
 988
 989                 $wgOut->addScript( "<script type=\"text/javascript\">
 990 wgAjaxUploadDestCheck = {$adc};
 991 wgAjaxLicensePreview = {$alp};
 992 wgUploadAutoFill = {$autofill};
 993 </script>" );
 994                 $wgOut->addScriptFile( 'upload.js' );
 995                 $wgOut->addScriptFile( 'edit.js' ); // For <charinsert> support
 996
 997                 if( !wfRunHooks( 'UploadForm:initial', array( &$this ) ) )
 998                 {
 999                         wfDebug( "Hook 'UploadForm:initial' broke output of the upload form\n" );
1000                         return false;
1001                 }
1002
1003                 if( $this->mDesiredDestName ) {
1004                         $title = Title::makeTitleSafe( NS_FILE, $this->mDesiredDestName );
1005                         // Show a subtitle link to deleted revisions (to sysops et al only)
1006                         if( $title instanceof Title && ( $count = $title->isDeleted() ) > 0 && $wgUser->isAllowed( 'deletedhistory' ) ) {
1007                                 $link = wfMsgExt(
1008                                         $wgUser->isAllowed( 'delete' ) ? 'thisisdeleted' : 'viewdeleted',
1009                                         array( 'parse', 'replaceafter' ),
1010                                         $wgUser->getSkin()->linkKnown(
1011                                                 SpecialPage::getTitleFor( 'Undelete', $title->getPrefixedText() ),
1012                                                 wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $count )
1013                                         )
1014                                 );
1015                                 $wgOut->addHTML( "<div id=\"contentSub2\">{$link}</div>" );
1016                         }
1017
1018                         // Show the relevant lines from deletion log (for still deleted files only)
1019                         if( $title instanceof Title && $title->isDeletedQuick() && !$title->exists() ) {
1020                                 $this->showDeletionLog( $wgOut, $title->getPrefixedText() );
1021                         }
1022                 }
1023
1024                 $cols = intval($wgUser->getOption( 'cols' ));
1025
1026                 if( $wgUser->getOption( 'editwidth' ) ) {
1027                         $width = " style=\"width:100%\"";
1028                 } else {
1029                         $width = '';
1030                 }
1031
1032                 if ( '' != $msg ) {
1033                         $sub = wfMsgHtml( 'uploaderror' );
1034                         $wgOut->addHTML( "<h2>{$sub}</h2>\n" .
1035                           "<span class='error'>{$msg}</span>\n" );
1036                 }
1037                 $wgOut->addHTML( '<div id="uploadtext">' );
1038                 $wgOut->addWikiMsg( 'uploadtext', $this->mDesiredDestName );
1039                 $wgOut->addHTML( "</div>\n" );
1040
1041                 # Print a list of allowed file extensions, if so configured.  We ignore
1042                 # MIME type here, it's incomprehensible to most people and too long.
1043                 global $wgCheckFileExtensions, $wgStrictFileExtensions,
1044                 $wgFileExtensions, $wgFileBlacklist;
1045
1046                 $allowedExtensions = '';
1047                 if( $wgCheckFileExtensions ) {
1048                         if( $wgStrictFileExtensions ) {
1049                                 # Everything not permitted is banned
1050                                 $extensionsList =
1051                                         '<div id="mw-upload-permitted">' .
1052                                         wfMsgWikiHtml( 'upload-permitted', $wgLang->commaList( $wgFileExtensions ) ) .
1053                                         "</div>\n";
1054                         } else {
1055                                 # We have to list both preferred and prohibited
1056                                 $extensionsList =
1057                                         '<div id="mw-upload-preferred">' .
1058                                         wfMsgWikiHtml( 'upload-preferred', $wgLang->commaList( $wgFileExtensions ) ) .
1059                                         "</div>\n" .
1060                                         '<div id="mw-upload-prohibited">' .
1061                                         wfMsgWikiHtml( 'upload-prohibited', $wgLang->commaList( $wgFileBlacklist ) ) .
1062                                         "</div>\n";
1063                         }
1064                 } else {
1065                         # Everything is permitted.
1066                         $extensionsList = '';
1067                 }
1068
1069                 # Get the maximum file size from php.ini as $wgMaxUploadSize works for uploads from URL via CURL only
1070                 # See http://www.php.net/manual/en/faq.using.php#faq.using.shorthandbytes for possible values of upload_max_filesize and post_max_filesize
1071                 $max_sizes = array();
1072                 $max_sizes[] = trim( ini_get( 'upload_max_filesize' ) );
1073                 $max_sizes[] = trim( ini_get( 'post_max_size' ) );
1074                 foreach( $max_sizes as &$size) {
1075                         $last = strtoupper( substr( $size, -1 ) );
1076                         switch( $last ) {
1077                                 case 'G':
1078                                         $size = substr( $size, 0, -1 ) * 1024 * 1024 * 1024;
1079                                         break;
1080                                 case 'M':
1081                                         $size = substr( $size, 0, -1 ) * 1024 * 1024;
1082                                         break;
1083                                 case 'K':
1084                                         $size = substr( $size, 0, -1 ) * 1024;
1085                                         break;
1086                         }
1087                 }
1088                 $val = min( $max_sizes[0], $max_sizes[1] );
1089                 $val = $wgAllowCopyUploads ? min( $wgMaxUploadSize, $val ) : $val;
1090                 $maxUploadSize = '<div id="mw-upload-maxfilesize">' .
1091                         wfMsgExt( 'upload-maxfilesize', array( 'parseinline', 'escapenoentities' ),
1092                                 $wgLang->formatSize( $val ) ) .
1093                                 "</div>\n";
1094
1095                 $sourcefilename = wfMsgExt( 'sourcefilename', array( 'parseinline', 'escapenoentities' ) );
1096         $destfilename = wfMsgExt( 'destfilename', array( 'parseinline', 'escapenoentities' ) );
1097
1098                 $msg = $this->mForReUpload ? 'filereuploadsummary' : 'fileuploadsummary';
1099                 $summary = wfMsgExt( $msg, 'parseinline' );
1100
1101                 $licenses = new Licenses();
1102                 $license = wfMsgExt( 'license', array( 'parseinline' ) );
1103                 $nolicense = wfMsgHtml( 'nolicense' );
1104                 $licenseshtml = $licenses->getHtml();
1105
1106                 $ulb = wfMsgHtml( 'uploadbtn' );
1107
1108
1109                 $titleObj = SpecialPage::getTitleFor( 'Upload' );
1110
1111                 $encDestName = htmlspecialchars( $this->mDesiredDestName );
1112
1113                 $watchChecked = $this->watchCheck() ? 'checked="checked"' : '';
1114                 # Re-uploads should not need "file exist already" warnings
1115                 $warningChecked = ($this->mIgnoreWarning || $this->mForReUpload) ? 'checked="checked"' : '';
1116
1117                 // Prepare form for upload or upload/copy
1118                 if( $wgAllowCopyUploads && $wgUser->isAllowed( 'upload_by_url' ) ) {
1119                         $filename_form =
1120                                 "<input type='radio' id='wpSourceTypeFile' name='wpSourceType' value='file' " .
1121                                    "onchange='toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\")' checked='checked' />" .
1122                                  "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1123                                    "onfocus='" .
1124                                      "toggle_element_activation(\"wpUploadFileURL\",\"wpUploadFile\");" .
1125                                      "toggle_element_check(\"wpSourceTypeFile\",\"wpSourceTypeURL\")' " .
1126                                      "onchange='fillDestFilename(\"wpUploadFile\")' size='60' />" .
1127                                 wfMsgHTML( 'upload_source_file' ) . "<br/>" .
1128                                 "<input type='radio' id='wpSourceTypeURL' name='wpSourceType' value='web' " .
1129                                   "onchange='toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\")' />" .
1130                                 "<input tabindex='1' type='text' name='wpUploadFileURL' id='wpUploadFileURL' " .
1131                                   "onfocus='" .
1132                                     "toggle_element_activation(\"wpUploadFile\",\"wpUploadFileURL\");" .
1133                                     "toggle_element_check(\"wpSourceTypeURL\",\"wpSourceTypeFile\")' " .
1134                                     "onchange='fillDestFilename(\"wpUploadFileURL\")' size='60' disabled='disabled' />" .
1135                                 wfMsgHtml( 'upload_source_url' ) ;
1136                 } else {
1137                         $filename_form =
1138                                 "<input tabindex='1' type='file' name='wpUploadFile' id='wpUploadFile' " .
1139                                 ($this->mDesiredDestName?"":"onchange='fillDestFilename(\"wpUploadFile\")' ") .
1140                                 "size='60' />" .
1141                                 "<input type='hidden' name='wpSourceType' value='file' />" ;
1142                 }
1143                 if ( $useAjaxDestCheck ) {
1144                         $warningRow = "<tr><td colspan='2' id='wpDestFile-warning'>&nbsp;</td></tr>";
1145                         $destOnkeyup = 'onkeyup="wgUploadWarningObj.keypress();"';
1146                 } else {
1147                         $warningRow = '';
1148                         $destOnkeyup = '';
1149                 }
1150                 $encComment = htmlspecialchars( $this->mComment );
1151
1152
1153                 $wgOut->addHTML(
1154                          Xml::openElement( 'form', array( 'method' => 'post', 'action' => $titleObj->getLocalURL(),
1155                                  'enctype' => 'multipart/form-data', 'id' => 'mw-upload-form' ) ) .
1156                          Xml::openElement( 'fieldset' ) .
1157                          Xml::element( 'legend', null, wfMsg( 'upload' ) ) .
1158                          Xml::openElement( 'table', array( 'border' => '0', 'id' => 'mw-upload-table' ) ) .
1159                          "<tr>
1160                                 {$this->uploadFormTextTop}
1161                                 <td class='mw-label'>
1162                                         <label for='wpUploadFile'>{$sourcefilename}</label>
1163                                 </td>
1164                                 <td class='mw-input'>
1165                                         {$filename_form}
1166                                 </td>
1167                         </tr>
1168                         <tr>
1169                                 <td></td>
1170                                 <td>
1171                                         {$maxUploadSize}
1172                                         {$extensionsList}
1173                                 </td>
1174                         </tr>
1175                         <tr>
1176                                 <td class='mw-label'>
1177                                         <label for='wpDestFile'>{$destfilename}</label>
1178                                 </td>
1179                                 <td class='mw-input'>"
1180                 );
1181                 if( $this->mForReUpload ) {
1182                         $wgOut->addHTML(
1183                                 Xml::hidden( 'wpDestFile', $this->mDesiredDestName, array('id'=>'wpDestFile','tabindex'=>2) ) .
1184                                 "<tt>" .
1185                                 $encDestName .
1186                                 "</tt>"
1187                         );
1188                 }
1189                 else {
1190                         $wgOut->addHTML(
1191                                 "<input tabindex='2' type='text' name='wpDestFile' id='wpDestFile' size='60'
1192                                                 value=\"{$encDestName}\" onchange='toggleFilenameFiller()' $destOnkeyup />"
1193                         );
1194                 }
1195
1196
1197                 $wgOut->addHTML(
1198                                 "</td>
1199                         </tr>
1200                         <tr>
1201                                 <td class='mw-label'>
1202                                         <label for='wpUploadDescription'>{$summary}</label>
1203                                 </td>
1204                                 <td class='mw-input'>
1205                                         <textarea tabindex='3' name='wpUploadDescription' id='wpUploadDescription' rows='6'
1206                                                 cols='{$cols}'{$width}>$encComment</textarea>
1207                                         {$this->uploadFormTextAfterSummary}
1208                                 </td>
1209                         </tr>
1210                         <tr>"
1211                 );
1212                 # Re-uploads should not need license info
1213                 if ( !$this->mForReUpload && $licenseshtml != '' ) {
1214                         global $wgStylePath;
1215                         $wgOut->addHTML( "
1216                                         <td class='mw-label'>
1217                                                 <label for='wpLicense'>$license</label>
1218                                         </td>
1219                                         <td class='mw-input'>
1220                                                 <select name='wpLicense' id='wpLicense' tabindex='4'
1221                                                         onchange='licenseSelectorCheck()'>
1222                                                         <option value=''>$nolicense</option>
1223                                                         $licenseshtml
1224                                                 </select>
1225                                         </td>
1226                                 </tr>
1227                                 <tr>"
1228                         );
1229                         if( $useAjaxLicensePreview ) {
1230                                 $wgOut->addHTML( "
1231                                                 <td></td>
1232                                                 <td id=\"mw-license-preview\"></td>
1233                                         </tr>
1234                                         <tr>"
1235                                 );
1236                         }
1237                 }
1238
1239                 if ( !$this->mForReUpload && $wgUseCopyrightUpload ) {
1240                         $filestatus = wfMsgExt( 'filestatus', 'escapenoentities' );
1241                         $copystatus =  htmlspecialchars( $this->mCopyrightStatus );
1242                         $filesource = wfMsgExt( 'filesource', 'escapenoentities' );
1243                         $uploadsource = htmlspecialchars( $this->mCopyrightSource );
1244
1245                         $wgOut->addHTML( "
1246                                         <td class='mw-label' style='white-space: nowrap;'>
1247                                                 <label for='wpUploadCopyStatus'>$filestatus</label></td>
1248                                         <td class='mw-input'>
1249                                                 <input tabindex='5' type='text' name='wpUploadCopyStatus' id='wpUploadCopyStatus'
1250                                                         value=\"$copystatus\" size='60' />
1251                                         </td>
1252                                 </tr>
1253                                 <tr>
1254                                         <td class='mw-label'>
1255                                                 <label for='wpUploadCopyStatus'>$filesource</label>
1256                                         </td>
1257                                         <td class='mw-input'>
1258                                                 <input tabindex='6' type='text' name='wpUploadSource' id='wpUploadCopyStatus'
1259                                                         value=\"$uploadsource\" size='60' />
1260                                         </td>
1261                                 </tr>
1262                                 <tr>"
1263                         );
1264                 }
1265
1266                 $wgOut->addHTML( "
1267                                 <td></td>
1268                                 <td>
1269                                         <input tabindex='7' type='checkbox' name='wpWatchthis' id='wpWatchthis' $watchChecked value='true' />
1270                                         <label for='wpWatchthis'>" . wfMsgHtml( 'watchthisupload' ) . "</label>
1271                                         <input tabindex='8' type='checkbox' name='wpIgnoreWarning' id='wpIgnoreWarning' value='true' $warningChecked />
1272                                         <label for='wpIgnoreWarning'>" . wfMsgHtml( 'ignorewarnings' ) . "</label>
1273                                 </td>
1274                         </tr>
1275                         $warningRow
1276                         <tr>
1277                                 <td></td>
1278                                         <td class='mw-input'>
1279                                                 <input tabindex='9' type='submit' name='wpUpload' value=\"{$ulb}\"" .
1280                                                         $wgUser->getSkin()->tooltipAndAccesskey( 'upload' ) . " />
1281                                         </td>
1282                         </tr>
1283                         <tr>
1284                                 <td></td>
1285                                 <td class='mw-input'>"
1286                 );
1287                 $wgOut->addHTML( '<div class="mw-editTools">' );
1288                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1289                 $wgOut->addHTML( '</div>' );
1290                 $wgOut->addHTML( "
1291                                 </td>
1292                         </tr>" .
1293                         Xml::closeElement( 'table' ) .
1294                         Xml::hidden( 'wpDestFileWarningAck', '', array( 'id' => 'wpDestFileWarningAck' ) ) .
1295                         Xml::hidden( 'wpForReUpload', $this->mForReUpload, array( 'id' => 'wpForReUpload' ) ) .
1296                         Xml::closeElement( 'fieldset' ) .
1297                         Xml::closeElement( 'form' )
1298                 );
1299                 $uploadfooter = wfMsgNoTrans( 'uploadfooter' );
1300                 if( $uploadfooter != '-' && !wfEmptyMsg( 'uploadfooter', $uploadfooter ) ){
1301                         $wgOut->addWikiText( '<div id="mw-upload-footer-message">' . $uploadfooter . '</div>' );
1302                 }
1303         }
1304
1305         /* -------------------------------------------------------------- */
1306
1307         /**
1308          * See if we should check the 'watch this page' checkbox on the form
1309          * based on the user's preferences and whether we're being asked
1310          * to create a new file or update an existing one.
1311          *
1312          * In the case where 'watch edits' is off but 'watch creations' is on,
1313          * we'll leave the box unchecked.
1314          *
1315          * Note that the page target can be changed *on the form*, so our check
1316          * state can get out of sync.
1317          */
1318         function watchCheck() {
1319                 global $wgUser;
1320                 if( $wgUser->getOption( 'watchdefault' ) ) {
1321                         // Watch all edits!
1322                         return true;
1323                 }
1324
1325                 $local = wfLocalFile( $this->mDesiredDestName );
1326                 if( $local && $local->exists() ) {
1327                         // We're uploading a new version of an existing file.
1328                         // No creation, so don't watch it if we're not already.
1329                         return $local->getTitle()->userIsWatching();
1330                 } else {
1331                         // New page should get watched if that's our option.
1332                         return $wgUser->getOption( 'watchcreations' );
1333                 }
1334         }
1335
1336         /**
1337          * Split a file into a base name and all dot-delimited 'extensions'
1338          * on the end. Some web server configurations will fall back to
1339          * earlier pseudo-'extensions' to determine type and execute
1340          * scripts, so the blacklist needs to check them all.
1341          *
1342          * @return array
1343          */
1344         public function splitExtensions( $filename ) {
1345                 $bits = explode( '.', $filename );
1346                 $basename = array_shift( $bits );
1347                 return array( $basename, $bits );
1348         }
1349
1350         /**
1351          * Perform case-insensitive match against a list of file extensions.
1352          * Returns true if the extension is in the list.
1353          *
1354          * @param string $ext
1355          * @param array $list
1356          * @return bool
1357          */
1358         function checkFileExtension( $ext, $list ) {
1359                 return in_array( strtolower( $ext ), $list );
1360         }
1361
1362         /**
1363          * Perform case-insensitive match against a list of file extensions.
1364          * Returns true if any of the extensions are in the list.
1365          *
1366          * @param array $ext
1367          * @param array $list
1368          * @return bool
1369          */
1370         public function checkFileExtensionList( $ext, $list ) {
1371                 foreach( $ext as $e ) {
1372                         if( in_array( strtolower( $e ), $list ) ) {
1373                                 return true;
1374                         }
1375                 }
1376                 return false;
1377         }
1378
1379         /**
1380          * Verifies that it's ok to include the uploaded file
1381          *
1382          * @param string $tmpfile the full path of the temporary file to verify
1383          * @param string $extension The filename extension that the file is to be served with
1384          * @return mixed true of the file is verified, a WikiError object otherwise.
1385          */
1386         function verify( $tmpfile, $extension ) {
1387                 #magically determine mime type
1388                 $magic = MimeMagic::singleton();
1389                 $mime = $magic->guessMimeType($tmpfile,false);
1390
1391
1392                 #check mime type, if desired
1393                 global $wgVerifyMimeType;
1394                 if ($wgVerifyMimeType) {
1395                         wfDebug ( "\n\nmime: <$mime> extension: <$extension>\n\n");
1396                         #check mime type against file extension
1397                         if( !self::verifyExtension( $mime, $extension ) ) {
1398                                 return new WikiErrorMsg( 'uploadcorrupt' );
1399                         }
1400
1401                         #check mime type blacklist
1402                         global $wgMimeTypeBlacklist;
1403                         if( isset($wgMimeTypeBlacklist) && !is_null($wgMimeTypeBlacklist) ) {
1404                                 if ( $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
1405                                         return new WikiErrorMsg( 'filetype-badmime', htmlspecialchars( $mime ) );
1406                                 }
1407
1408                                 # Check IE type
1409                                 $fp = fopen( $tmpfile, 'rb' );
1410                                 $chunk = fread( $fp, 256 );
1411                                 fclose( $fp );
1412                                 $extMime = $magic->guessTypesForExtension( $extension );
1413                                 $ieTypes = $magic->getIEMimeTypes( $tmpfile, $chunk, $extMime );
1414                                 foreach ( $ieTypes as $ieType ) {
1415                                         if ( $this->checkFileExtension( $ieType, $wgMimeTypeBlacklist ) ) {
1416                                                 return new WikiErrorMsg( 'filetype-bad-ie-mime', $ieType );
1417                                         }
1418                                 }
1419                         }
1420                 }
1421
1422                 #check for htmlish code and javascript
1423                 if( $this->detectScript ( $tmpfile, $mime, $extension ) ) {
1424                         return new WikiErrorMsg( 'uploadscripted' );
1425                 }
1426                 if( $extension == 'svg' || $mime == 'image/svg+xml' ) {
1427                         if( $this->detectScriptInSvg( $tmpfile ) ) {
1428                                 return new WikiErrorMsg( 'uploadscripted' );
1429                         }
1430                 }
1431
1432                 /**
1433                 * Scan the uploaded file for viruses
1434                 */
1435                 $virus= $this->detectVirus($tmpfile);
1436                 if ( $virus ) {
1437                         return new WikiErrorMsg( 'uploadvirus', htmlspecialchars($virus) );
1438                 }
1439
1440                 wfDebug( __METHOD__.": all clear; passing.\n" );
1441                 return true;
1442         }
1443
1444         /**
1445          * Checks if the mime type of the uploaded file matches the file extension.
1446          *
1447          * @param string $mime the mime type of the uploaded file
1448          * @param string $extension The filename extension that the file is to be served with
1449          * @return bool
1450          */
1451         static function verifyExtension( $mime, $extension ) {
1452                 $magic = MimeMagic::singleton();
1453
1454                 if ( ! $mime || $mime == 'unknown' || $mime == 'unknown/unknown' )
1455                         if ( ! $magic->isRecognizableExtension( $extension ) ) {
1456                                 wfDebug( __METHOD__.": passing file with unknown detected mime type; " .
1457                                         "unrecognized extension '$extension', can't verify\n" );
1458                                 return true;
1459                         } else {
1460                                 wfDebug( __METHOD__.": rejecting file with unknown detected mime type; ".
1461                                         "recognized extension '$extension', so probably invalid file\n" );
1462                                 return false;
1463                         }
1464
1465                 $match= $magic->isMatchingExtension($extension,$mime);
1466
1467                 if ($match===NULL) {
1468                         wfDebug( __METHOD__.": no file extension known for mime type $mime, passing file\n" );
1469                         return true;
1470                 } elseif ($match===true) {
1471                         wfDebug( __METHOD__.": mime type $mime matches extension $extension, passing file\n" );
1472
1473                         #TODO: if it's a bitmap, make sure PHP or ImageMagic resp. can handle it!
1474                         return true;
1475
1476                 } else {
1477                         wfDebug( __METHOD__.": mime type $mime mismatches file extension $extension, rejecting file\n" );
1478                         return false;
1479                 }
1480         }
1481
1482
1483         /**
1484          * Heuristic for detecting files that *could* contain JavaScript instructions or
1485          * things that may look like HTML to a browser and are thus
1486          * potentially harmful. The present implementation will produce false positives in some situations.
1487          *
1488          * @param string $file Pathname to the temporary upload file
1489          * @param string $mime The mime type of the file
1490          * @param string $extension The extension of the file
1491          * @return bool true if the file contains something looking like embedded scripts
1492          */
1493         function detectScript($file, $mime, $extension) {
1494                 global $wgAllowTitlesInSVG;
1495
1496                 #ugly hack: for text files, always look at the entire file.
1497                 #For binarie field, just check the first K.
1498
1499                 if (strpos($mime,'text/')===0) $chunk = file_get_contents( $file );
1500                 else {
1501                         $fp = fopen( $file, 'rb' );
1502                         $chunk = fread( $fp, 1024 );
1503                         fclose( $fp );
1504                 }
1505
1506                 $chunk= strtolower( $chunk );
1507
1508                 if (!$chunk) return false;
1509
1510                 #decode from UTF-16 if needed (could be used for obfuscation).
1511                 if (substr($chunk,0,2)=="\xfe\xff") $enc= "UTF-16BE";
1512                 elseif (substr($chunk,0,2)=="\xff\xfe") $enc= "UTF-16LE";
1513                 else $enc= NULL;
1514
1515                 if ($enc) $chunk= iconv($enc,"ASCII//IGNORE",$chunk);
1516
1517                 $chunk= trim($chunk);
1518
1519                 #FIXME: convert from UTF-16 if necessarry!
1520
1521                 wfDebug("SpecialUpload::detectScript: checking for embedded scripts and HTML stuff\n");
1522
1523                 #check for HTML doctype
1524                 if ( preg_match( "/<!DOCTYPE *X?HTML/i", $chunk ) ) return true;
1525
1526                 /**
1527                 * Internet Explorer for Windows performs some really stupid file type
1528                 * autodetection which can cause it to interpret valid image files as HTML
1529                 * and potentially execute JavaScript, creating a cross-site scripting
1530                 * attack vectors.
1531                 *
1532                 * Apple's Safari browser also performs some unsafe file type autodetection
1533                 * which can cause legitimate files to be interpreted as HTML if the
1534                 * web server is not correctly configured to send the right content-type
1535                 * (or if you're really uploading plain text and octet streams!)
1536                 *
1537                 * Returns true if IE is likely to mistake the given file for HTML.
1538                 * Also returns true if Safari would mistake the given file for HTML
1539                 * when served with a generic content-type.
1540                 */
1541
1542                 $tags = array(
1543                         '<a href',
1544                         '<body',
1545                         '<head',
1546                         '<html',   #also in safari
1547                         '<img',
1548                         '<pre',
1549                         '<script', #also in safari
1550                         '<table'
1551                         );
1552                 if( ! $wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
1553                         $tags[] = '<title';
1554                 }
1555
1556                 foreach( $tags as $tag ) {
1557                         if( false !== strpos( $chunk, $tag ) ) {
1558                                 return true;
1559                         }
1560                 }
1561
1562                 /*
1563                 * look for javascript
1564                 */
1565
1566                 #resolve entity-refs to look at attributes. may be harsh on big files... cache result?
1567                 $chunk = Sanitizer::decodeCharReferences( $chunk );
1568
1569                 #look for script-types
1570                 if (preg_match('!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim',$chunk)) return true;
1571
1572                 #look for html-style script-urls
1573                 if (preg_match('!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1574
1575                 #look for css-style script-urls
1576                 if (preg_match('!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim',$chunk)) return true;
1577
1578                 wfDebug("SpecialUpload::detectScript: no scripts found\n");
1579                 return false;
1580         }
1581
1582         function detectScriptInSvg( $filename ) {
1583                 $check = new XmlTypeCheck( $filename, array( $this, 'checkSvgScriptCallback' ) );
1584                 return $check->filterMatch;
1585         }
1586
1587         /**
1588          * @todo Replace this with a whitelist filter!
1589          */
1590         function checkSvgScriptCallback( $element, $attribs ) {
1591                 $stripped = $this->stripXmlNamespace( $element );
1592
1593                 if( $stripped == 'script' ) {
1594                         wfDebug( __METHOD__ . ": Found script element '$element' in uploaded file.\n" );
1595                         return true;
1596                 }
1597
1598                 foreach( $attribs as $attrib => $value ) {
1599                         $stripped = $this->stripXmlNamespace( $attrib );
1600                         if( substr( $stripped, 0, 2 ) == 'on' ) {
1601                                 wfDebug( __METHOD__ . ": Found script attribute '$attrib'='value' in uploaded file.\n" );
1602                                 return true;
1603                         }
1604                         if( $stripped == 'href' && strpos( strtolower( $value ), 'javascript:' ) !== false ) {
1605                                 wfDebug( __METHOD__ . ": Found script href attribute '$attrib'='$value' in uploaded file.\n" );
1606                                 return true;
1607                         }
1608                 }
1609         }
1610
1611         private function stripXmlNamespace( $name ) {
1612                 // 'http://www.w3.org/2000/svg:script' -> 'script'
1613                 $parts = explode( ':', strtolower( $name ) );
1614                 return array_pop( $parts );
1615         }
1616
1617         /**
1618          * Generic wrapper function for a virus scanner program.
1619          * This relies on the $wgAntivirus and $wgAntivirusSetup variables.
1620          * $wgAntivirusRequired may be used to deny upload if the scan fails.
1621          *
1622          * @param string $file Pathname to the temporary upload file
1623          * @return mixed false if not virus is found, NULL if the scan fails or is disabled,
1624          *         or a string containing feedback from the virus scanner if a virus was found.
1625          *         If textual feedback is missing but a virus was found, this function returns true.
1626          */
1627         function detectVirus($file) {
1628                 global $wgAntivirus, $wgAntivirusSetup, $wgAntivirusRequired, $wgOut;
1629
1630                 if ( !$wgAntivirus ) {
1631                         wfDebug( __METHOD__.": virus scanner disabled\n");
1632                         return NULL;
1633                 }
1634
1635                 if ( !$wgAntivirusSetup[$wgAntivirus] ) {
1636                         wfDebug( __METHOD__.": unknown virus scanner: $wgAntivirus\n" );
1637                         $wgOut->wrapWikiMsg( '<div class="error">$1</div>', array( 'virus-badscanner', $wgAntivirus ) );
1638                         return wfMsg('virus-unknownscanner') . " $wgAntivirus";
1639                 }
1640
1641                 # look up scanner configuration
1642                 $command = $wgAntivirusSetup[$wgAntivirus]["command"];
1643                 $exitCodeMap = $wgAntivirusSetup[$wgAntivirus]["codemap"];
1644                 $msgPattern = isset( $wgAntivirusSetup[$wgAntivirus]["messagepattern"] ) ?
1645                         $wgAntivirusSetup[$wgAntivirus]["messagepattern"] : null;
1646
1647                 if ( strpos( $command,"%f" ) === false ) {
1648                         # simple pattern: append file to scan
1649                         $command .= " " . wfEscapeShellArg( $file );
1650                 } else {
1651                         # complex pattern: replace "%f" with file to scan
1652                         $command = str_replace( "%f", wfEscapeShellArg( $file ), $command );
1653                 }
1654
1655                 wfDebug( __METHOD__.": running virus scan: $command \n" );
1656
1657                 # execute virus scanner
1658                 $exitCode = false;
1659
1660                 #NOTE: there's a 50 line workaround to make stderr redirection work on windows, too.
1661                 #      that does not seem to be worth the pain.
1662                 #      Ask me (Duesentrieb) about it if it's ever needed.
1663                 $output = array();
1664                 if ( wfIsWindows() ) {
1665                         exec( "$command", $output, $exitCode );
1666                 } else {
1667                         exec( "$command 2>&1", $output, $exitCode );
1668                 }
1669
1670                 # map exit code to AV_xxx constants.
1671                 $mappedCode = $exitCode;
1672                 if ( $exitCodeMap ) {
1673                         if ( isset( $exitCodeMap[$exitCode] ) ) {
1674                                 $mappedCode = $exitCodeMap[$exitCode];
1675                         } elseif ( isset( $exitCodeMap["*"] ) ) {
1676                                 $mappedCode = $exitCodeMap["*"];
1677                         }
1678                 }
1679
1680                 if ( $mappedCode === AV_SCAN_FAILED ) {
1681                         # scan failed (code was mapped to false by $exitCodeMap)
1682                         wfDebug( __METHOD__.": failed to scan $file (code $exitCode).\n" );
1683
1684                         if ( $wgAntivirusRequired ) {
1685                                 return wfMsg('virus-scanfailed', array( $exitCode ) );
1686                         } else {
1687                                 return NULL;
1688                         }
1689                 } else if ( $mappedCode === AV_SCAN_ABORTED ) {
1690                         # scan failed because filetype is unknown (probably imune)
1691                         wfDebug( __METHOD__.": unsupported file type $file (code $exitCode).\n" );
1692                         return NULL;
1693                 } else if ( $mappedCode === AV_NO_VIRUS ) {
1694                         # no virus found
1695                         wfDebug( __METHOD__.": file passed virus scan.\n" );
1696                         return false;
1697                 } else {
1698                         $output = join( "\n", $output );
1699                         $output = trim( $output );
1700
1701                         if ( !$output ) {
1702                                 $output = true; #if there's no output, return true
1703                         } elseif ( $msgPattern ) {
1704                                 $groups = array();
1705                                 if ( preg_match( $msgPattern, $output, $groups ) ) {
1706                                         if ( $groups[1] ) {
1707                                                 $output = $groups[1];
1708                                         }
1709                                 }
1710                         }
1711
1712                         wfDebug( __METHOD__.": FOUND VIRUS! scanner feedback: $output \n" );
1713                         return $output;
1714                 }
1715         }
1716
1717         /**
1718          * Check if the temporary file is MacBinary-encoded, as some uploads
1719          * from Internet Explorer on Mac OS Classic and Mac OS X will be.
1720          * If so, the data fork will be extracted to a second temporary file,
1721          * which will then be checked for validity and either kept or discarded.
1722          *
1723          * @access private
1724          */
1725         function checkMacBinary() {
1726                 $macbin = new MacBinary( $this->mTempPath );
1727                 if( $macbin->isValid() ) {
1728                         $dataFile = tempnam( wfTempDir(), "WikiMacBinary" );
1729                         $dataHandle = fopen( $dataFile, 'wb' );
1730
1731                         wfDebug( "SpecialUpload::checkMacBinary: Extracting MacBinary data fork to $dataFile\n" );
1732                         $macbin->extractData( $dataHandle );
1733
1734                         $this->mTempPath = $dataFile;
1735                         $this->mFileSize = $macbin->dataForkLength();
1736
1737                         // We'll have to manually remove the new file if it's not kept.
1738                         $this->mRemoveTempFile = true;
1739                 }
1740                 $macbin->close();
1741         }
1742
1743         /**
1744          * If we've modified the upload file we need to manually remove it
1745          * on exit to clean up.
1746          * @access private
1747          */
1748         function cleanupTempFile() {
1749                 if ( $this->mRemoveTempFile && $this->mTempPath && file_exists( $this->mTempPath ) ) {
1750                         wfDebug( "SpecialUpload::cleanupTempFile: Removing temporary file {$this->mTempPath}\n" );
1751                         unlink( $this->mTempPath );
1752                 }
1753         }
1754
1755         /**
1756          * Check if there's an overwrite conflict and, if so, if restrictions
1757          * forbid this user from performing the upload.
1758          *
1759          * @return mixed true on success, WikiError on failure
1760          * @access private
1761          */
1762         function checkOverwrite( $name ) {
1763                 $img = wfFindFile( $name );
1764
1765                 $error = '';
1766                 if( $img ) {
1767                         global $wgUser, $wgOut;
1768                         if( $img->isLocal() ) {
1769                                 if( !self::userCanReUpload( $wgUser, $img->name ) ) {
1770                                         $error = 'fileexists-forbidden';
1771                                 }
1772                         } else {
1773                                 if( !$wgUser->isAllowed( 'reupload' ) ||
1774                                     !$wgUser->isAllowed( 'reupload-shared' ) ) {
1775                                         $error = "fileexists-shared-forbidden";
1776                                 }
1777                         }
1778                 }
1779
1780                 if( $error ) {
1781                         $errorText = wfMsg( $error, wfEscapeWikiText( $img->getName() ) );
1782                         return $errorText;
1783                 }
1784
1785                 // Rockin', go ahead and upload
1786                 return true;
1787         }
1788
1789          /**
1790          * Check if a user is the last uploader
1791          *
1792          * @param User $user
1793          * @param string $img, image name
1794          * @return bool
1795          */
1796         public static function userCanReUpload( User $user, $img ) {
1797                 if( $user->isAllowed( 'reupload' ) )
1798                         return true; // non-conditional
1799                 if( !$user->isAllowed( 'reupload-own' ) )
1800                         return false;
1801
1802                 $dbr = wfGetDB( DB_SLAVE );
1803                 $row = $dbr->selectRow('image',
1804                 /* SELECT */ 'img_user',
1805                 /* WHERE */ array( 'img_name' => $img )
1806                 );
1807                 if ( !$row )
1808                         return false;
1809
1810                 return $user->getId() == $row->img_user;
1811         }
1812
1813         /**
1814          * Display an error with a wikitext description
1815          */
1816         function showError( $description ) {
1817                 global $wgOut;
1818                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
1819                 $wgOut->setRobotPolicy( "noindex,nofollow" );
1820                 $wgOut->setArticleRelated( false );
1821                 $wgOut->enableClientCache( false );
1822                 $wgOut->addWikiText( $description );
1823         }
1824
1825         /**
1826          * Get the initial image page text based on a comment and optional file status information
1827          */
1828         static function getInitialPageText( $comment, $license, $copyStatus, $source ) {
1829                 global $wgUseCopyrightUpload;
1830                 if ( $wgUseCopyrightUpload ) {
1831                         if ( $license != '' ) {
1832                                 $licensetxt = '== ' . wfMsgForContent( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1833                         }
1834                         $pageText = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n" .
1835                           '== ' . wfMsgForContent ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" .
1836                           "$licensetxt" .
1837                           '== ' . wfMsgForContent ( 'filesource' ) . " ==\n" . $source ;
1838                 } else {
1839                         if ( $license != '' ) {
1840                                 $filedesc = $comment == '' ? '' : '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $comment . "\n";
1841                                  $pageText = $filedesc .
1842                                          '== ' . wfMsgForContent ( 'license' ) . " ==\n" . '{{' . $license . '}}' . "\n";
1843                         } else {
1844                                 $pageText = $comment;
1845                         }
1846                 }
1847                 return $pageText;
1848         }
1849
1850         /**
1851          * If there are rows in the deletion log for this file, show them,
1852          * along with a nice little note for the user
1853          *
1854          * @param OutputPage $out
1855          * @param string filename
1856          */
1857         private function showDeletionLog( $out, $filename ) {
1858                 global $wgUser;
1859                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
1860                 $pager = new LogPager( $loglist, 'delete', false, $filename );
1861                 if( $pager->getNumRows() > 0 ) {
1862                         $out->addHTML( '<div class="mw-warning-with-logexcerpt">' );
1863                         $out->addWikiMsg( 'upload-wasdeleted' );
1864                         $out->addHTML(
1865                                 $loglist->beginLogEventsList() .
1866                                 $pager->getBody() .
1867                                 $loglist->endLogEventsList()
1868                         );
1869                         $out->addHTML( '</div>' );
1870                 }
1871         }
1872 }